Add -and-cancel variants for scrolling commands to exit copy mode when

the bottom is reached, from Stephen Hicks.

tmux.1

@@ -1122,9 +1122,10 @@ The following commands are supported in copy mode:
 .It Li "end-of-line" Ta "$" Ta "C-e"
 .It Li "goto-line <line>" Ta ":" Ta "g"
 .It Li "halfpage-down" Ta "C-d" Ta "M-Down"
+.It Li "halfpage-down-and-cancel" Ta "" Ta ""
 .It Li "halfpage-up" Ta "C-u" Ta "M-Up"
-.It Li "history-bottom" Ta "G" Ta "M-<"
+.It Li "history-bottom" Ta "G" Ta "M->"
-.It Li "history-top" Ta "g" Ta "M->"
+.It Li "history-top" Ta "g" Ta "M-<"
 .It Li "jump-again" Ta ";" Ta ";"
 .It Li "jump-backward <to>" Ta "F" Ta "F"
 .It Li "jump-forward <to>" Ta "f" Ta "f"
@@ -1139,12 +1140,14 @@ The following commands are supported in copy mode:
 .It Li "next-word-end" Ta "e" Ta "M-f"
 .It Li "other-end" Ta "o" Ta ""
 .It Li "page-down" Ta "C-f" Ta "PageDown"
+.It Li "page-down-and-cancel" Ta "" Ta ""
 .It Li "page-up" Ta "C-b" Ta "PageUp"
 .It Li "previous-paragraph" Ta "{" Ta "M-{"
 .It Li "previous-space" Ta "B" Ta ""
 .It Li "previous-word" Ta "b" Ta "M-b"
 .It Li "rectangle-toggle" Ta "v" Ta "R"
 .It Li "scroll-down" Ta "C-e" Ta "C-Down"
+.It Li "scroll-down-and-cancel" Ta "" Ta ""
 .It Li "scroll-up" Ta "C-y" Ta "C-Up"
 .It Li "search-again" Ta "n" Ta "n"
 .It Li "search-backward <for>" Ta "?" Ta ""
@@ -1158,6 +1161,11 @@ The following commands are supported in copy mode:
 .It Li "top-line" Ta "H" Ta "M-R"
 .El
 .Pp
+The
+.Ql -and-cancel
+variants of some commands exit copy mode after they have completed (for copy
+commands) or when the cursor reaches the bottom (for scrolling commands).
+.Pp
 The next and previous word keys use space and the
 .Ql - ,
 .Ql _

window-copy.c

@@ -30,7 +30,7 @@ static void	window_copy_command(struct window_pane *, struct client *,
 static struct screen *window_copy_init(struct window_pane *,
 		    struct cmd_find_state *, struct args *);
 static void	window_copy_free(struct window_pane *);
-static int	window_copy_pagedown(struct window_pane *, int);
+static int	window_copy_pagedown(struct window_pane *, int, int);
 static void	window_copy_next_paragraph(struct window_pane *);
 static void	window_copy_previous_paragraph(struct window_pane *);
 static void	window_copy_resize(struct window_pane *, u_int, u_int);
@@ -392,7 +392,7 @@ window_copy_pageup(struct window_pane *wp, int half_page)
 }
 
 static int
-window_copy_pagedown(struct window_pane *wp, int half_page)
+window_copy_pagedown(struct window_pane *wp, int half_page, int scroll_exit)
 {
 	struct window_copy_mode_data	*data = wp->modedata;
 	struct screen			*s = &data->screen;
@@ -431,7 +431,7 @@ window_copy_pagedown(struct window_pane *wp, int half_page)
 			window_copy_cursor_end_of_line(wp);
 	}
 
-	if (data->scroll_exit && data->oy == 0)
+	if (scroll_exit && data->oy == 0)
 		return (1);
 	window_copy_update_selection(wp, 1);
 	window_copy_redraw_screen(wp);
@@ -524,7 +524,7 @@ window_copy_command(struct window_pane *wp, struct client *c, struct session *s,
 	struct screen			*sn = &data->screen;
 	const char			*command, *argument, *ws;
 	u_int				 np = wp->modeprefix;
-	int				 cancel = 0, redraw = 0;
+	int				 cancel = 0, redraw = 0, scroll_exit;
 	char				 prefix;
 
 	if (args->argc == 0)
@@ -629,9 +629,14 @@ window_copy_command(struct window_pane *wp, struct client *c, struct session *s,
 		}
 		if (strcmp(command, "end-of-line") == 0)
 			window_copy_cursor_end_of_line(wp);
-		if (strcmp(command, "halfpage-down") == 0) {
+		if (strcmp(command, "halfpage-down") == 0 ||
+		    strcmp(command, "halfpage-down-and-cancel") == 0) {
+			if (strcmp(command, "halfpage-down-and-cancel") == 0)
+				scroll_exit = 1;
+			else
+				scroll_exit = data->scroll_exit;
 			for (; np != 0; np--) {
-				if (window_copy_pagedown(wp, 1)) {
+				if (window_copy_pagedown(wp, 1, scroll_exit)) {
 					cancel = 1;
 					break;
 				}
@@ -727,9 +732,14 @@ window_copy_command(struct window_pane *wp, struct client *c, struct session *s,
 			if ((np % 2) != 0)
 				window_copy_other_end(wp);
 		}
-		if (strcmp(command, "page-down") == 0) {
+		if (strcmp(command, "page-down") == 0 ||
+		    strcmp(command, "page-down-and-cancel") == 0) {
+			if (strcmp(command, "page-down-and-cancel") == 0)
+				scroll_exit = 1;
+			else
+				scroll_exit = data->scroll_exit;
 			for (; np != 0; np--) {
-				if (window_copy_pagedown(wp, 0)) {
+				if (window_copy_pagedown(wp, 0, scroll_exit)) {
 					cancel = 1;
 					break;
 				}
@@ -756,10 +766,15 @@ window_copy_command(struct window_pane *wp, struct client *c, struct session *s,
 			sn->sel.lineflag = LINE_SEL_NONE;
 			window_copy_rectangle_toggle(wp);
 		}
-		if (strcmp(command, "scroll-down") == 0) {
+		if (strcmp(command, "scroll-down") == 0 ||
+		    strcmp(command, "scroll-down-and-cancel") == 0) {
+			if (strcmp(command, "scroll-down-and-cancel") == 0)
+				scroll_exit = 1;
+			else
+				scroll_exit = data->scroll_exit;
 			for (; np != 0; np--)
 				window_copy_cursor_down(wp, 1);
-			if (data->scroll_exit && data->oy == 0)
+			if (scroll_exit && data->oy == 0)
 				cancel = 1;
 		}
 		if (strcmp(command, "scroll-up") == 0) {